Elevator shaft door



P 1949. J. A. SCHWEIG 2,482,639

ELEVATOR SHAFT DOOR Filed March 2'7, 1947 2 Sheets-Sheet l 6 6 v /f I INVENTORQ- HIS ATTORNEYS.

Sept. 20, 1949.

J. A. SCHWEIG ELEVATOR SHAFT DOOR Filed March 27, 1947 2 Sheets-Sheet 2 FIG. 3.

F IG. 2'.

HIS ATTORNEYS.

Patented Sept. 20, 1949 g ELEVATOR siinrripoon ."Julius .SchWcig; Glayt01i,i M0;, 3;SSign0r 10 :Se-

curity Eire =Door :Cemneny, :.,St. Louis, "M0,," at corporation-of Missourie, 1 I

ApplicationMarch'M, 194Z;j$eriaf "N05737i5'82 I his' invention =relatesto elevator-shaft Jdcors er the kind wherein twovertica'llyslidingrcounterbalanced 'door sections -move in :oppositeidirections 'inopening and closing in unison,-.and' thelower door section provided with .ailatche ing device which prevents jointropening movement of both door sections, but does :not'prevent the upper door section frorn'b'eing'opened tin dependently of the lower. door section. Thepres- --'upw-ardly around *sheaves fl 'n'rountedon the anele bar door guides 4 and thence downwardly in the' di-rection of the'lower door section--2yihere t-hey a-re conne'cted to the upper ends of upright -'*cha'i-n-' rods "ill-whose lower ends are secure'd to theeuter ends of 'door arms t I that'proj ect horizoii-ta lly beyond theside edges area-1c lower docr "section. 'By this arrangement, each'd0o'r section acts as' a counterbalance for the other door seeout invention has for 'its principal objects rtozel 0* tio'n whereby the door may be easily opened by {pushing down on thelower door section 2 or provide a separate latchin :devicex'forfi'the 5111)- .per. door section; toprovideimeansacontroll'edrby the movement ofithe loweridoor'ilatchto operative position for. moving the upper do'or iatchwto op- .erative position; to :provide. for moving the il'li'p' iil :per' door' l-atch to inoperative position-when the flower door latch is moved to inoperative lposi- 'ition; and to provide for "simplicity: sand cheap- :ness of construction :and compactnesszofid'esign.

The" invention consists in 1 the elevator shaft .zdoor construction "and :in the parts and :com-

part of this specification, andwherein like syni hols refer to like parts wherevcrthey occur.

Fig. 1 is a shaft side e'levationale'v' iew (if-an elevator shaft door construction embodying my invention, 1

Fig, 2 is an enlarged fragmentary shaftJside' elevationalyiew in the region of the lock-ing.-d-

vice,

-Fig-. 3 is a side edge elevational view ofxthe parts shown in Fig. 2; and Y Fig. 4 is a horizontal sectional view on the line 4 in Fig. 2.

In the accompanying drawings, my invention is shown embodied in a vertically sliding, centerparting, counterbalanced door construction of the kind used for closing the door space or opening in an elevator shaft. Said door construction comprises vertical sliding upper and lower door sections l and 2, respectively, each provided alon each vertical edge with an angle bar side rail 3 having an outstanding flange 'slidably arranged between an upright double angle bar door guide rigidly secured to the adjacent jamb member 5 of the door frame. A guide shoe 6 is fixed to the outstanding flange of the angle bar side rail 3 and straddles one flange of the double angle bar door guide :2.

The upper and lower door sections and 2' are counterbalanced by means of chains 1 that are connected, as at 8, to the lower corners of the upper door section.

=' pushing upon the upper door section I.

' The lower door section 2 is provided witha la hing device comprising an operating lever which is p'ivotally mounted onthe shaft side -er he said door section 'L'an'd oppositely ex- -'tejnrling horizontal latch bars 43 pivotally connacted at their inner ends to the respective upper'and-lower arrnsv of sai'd' operating lever. The latc'h bars t3 are 'supported on the lower door section 'zfor'horizontal sliding movement into and- -out o'f engagement 'with suitable keepers l lor interlocks (not shown) fixed to thedouble anglebar door guides 4, A coil springl 5 is eattached-atone-end to oneof thearms of the lever 1' 2 and at its other end to a lug it on the lower,door sectionigthe parts beingarranged so-that thespringtends to project the latch bars to latchi-ng 'position.

From theconstr-uction thus far "described, it WI be see'n-thatthe latching device on the lower "-door section prevents both door sections from opening in unison; but said latching device does "*n'ot' prevent the "upper door section from being The chains I extend 55 opened independently of the locked lower door section by lifting the dead weight of the upper door section. In order to prevent the upper door section from being separately opened when both sections are locked against joint opening movement, the upper door section is provided with a separate latching mechanism that will positively lock the closed upper door section when the closed lower door section is locked and will unlock said closed upper door section when said closed lower door section is unlocked.

The separate latching device for the upper door section comprises a latch bolt I! that is supported for axial sliding movement in a holderplate I8.

that is mounted on a main or base plate I9 secured fiatwise by means of bolts to the outstanding flange of one or each of the double angle bar door guides 4. The latch bolt H is slidable crosswise of the double angle bar door guide 4 and is adapted, in the closed position of the upper door section, to move across the top of the guide shoe 6 fixed to the adjacent angle bar side rail 3 of said upper door section.

The latch bolt I1 is moved into and out of looking position by means of an upright lever 20 that is pivotally supported, as at 2|, on a bracket 22 fixed to the main or base plate H]. The latch bolt holder l8 and the lever supporting bracket 22 are secured to the base plate I!) by means of bolts 23 which also secure said base plate to the outstanding flange of the double angle bar side rail 4. The lever supporting pivot 2| is disposed horizontally and at right angles to the latch bolt l'l, whereby the lever 20 is adapted for vertical swinging movement in the direction of the sliding;

movement of said latch bolt. The upper arm of the lever terminates in a bifurcated or forkedend portion 24 that straddles the transversely grooved portion of the latch bolt I1; and the lower arm of said lever has an abutment stud 25 threaded therethrough with one end in abutting relation to the efiective end of the adjacent spring projected latch bar l3 of the closed lower door section. A coil compression spring 26 is interposed between the upper, latch bolt engaging arm of the lever 20 and the base plate 19 and has one end supported on a lug 21 on said arm and the other end supported on a lug 28 on said plate.

When the door is closed, the latch bar 13 of the lower doorsection in moving upwardly from the dotted position shown in Fig. 2 snaps over the upper end of said keeper I4 on the door guide 4, thus locking the lower door section in closed position. At the same time, the outer or effective end of the latch bar I3 bears against the end of the abutment stud 25 on the lower arm of the lever 26, thus swinging the same in a direction that will slide the effective end of the latch bolt l1 across the top of the guide shoe 6 fixed to the closed upper door section, whereby said end of said latch bolt serves as a stop for said guide shoe and thus prevents said upper door section from being opened. When the latching mechanism for the lower door section is operated to retract the latch bar l3 and thus unlock said section, the endwise pressure of said latch bar on the abutment stud 25 at the lower end of the lower arm of the lever 20 is relieved, thus permitting the coil compression spring 26 to swing said lever in a direction that will retract the latch bolt H for the upper door section and thus permit the latter to be opened. Thus, the upper door latching mechanism is moved to locking position by the movement of the lower door latching mechanism to locking position and is moved to unlocking position when said lower door latching mechanism is moved to unlocking position. The length of movement of the latch bolt I1 may be regulated by adjusting the threaded abutment stud 25 in the lever 20.

Obviously, the hereinbefore described elevator shaft door construction admits of considerable modification without departing from the invention. Therefore, I do not wish to be limited to the precise arrangements shown and described.

What I claim is:

In a door construction comprising a door frame, slidable upper and lower door sections movable vertically in unison in opposite directions to open and close said frame and a latch bar mounted on the lower door section for horizontal sliding movement into and out of locking engagement with said door frame in the closed position of said lower door section, the combination of separate means for locking said upper door section in closed position, said upper door section locking means comprising a latch bolt mounted on said door frame for horizontal sliding movement into and out of locking relation to said upper door section in the closed position thereof, an upright lever mounted on said frame with its upper end directly connected to said latch bolt for moving the same into and out of locking position, a stud carried by the lower end of said lever and positioned to be engaged by the effective end of said latch bar in the locking position thereof to move said lever in a direction that will move the latch =bolt connected to the upper end thereof to looking position, said stud being adjustable relative to said lever for varying the length of movement of said latch bolt, and a spring interposed between said frame and said lever for holding said stud in abutting engagement with said efi'ective end of said latch bar in all positions thereof and for moving said lever in a direction that will move said latch bolt to unlocking position when said latch bar is moved to unlocking position.

I JULIUS A. SCHWEIG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

